Chemistry Miscellaneous Part-3

Total Questions: 36

1. In a car battery, electrolyte substance used is— [42nd B.P.S.C. (Pre) 1997]

Correct Answer: (b) Sulphuric acid
Solution:Electrolyte substance used in a car battery is sulphuric acid (H₂SO₄). It is a strong acid.

2. Which one of the following acids is used in the car batteries? [U.P. R.O./A.R.O. (Pre) (Re. Exam) 2016]

Correct Answer: (c) Sulphuric Acid
Solution:Electrolyte substance used in a car battery is sulphuric acid (H₂SO₄). It is a strong acid.

3. Which one of the following solutions of electrolytes is used in the car battery? [U.P.P.C.S. (Pre) 2015]

Correct Answer: (c) Sulphuric acid
Solution:Electrolyte substance used in a car battery is sulphuric acid (H₂SO₄). It is a strong acid.

4. The acid used in a car battery is: [63rd B.P.S.C. (Pre) 2017]

Correct Answer: (d) Sulfuric acid
Solution:Electrolyte substance used in a car battery is sulphuric acid (H₂SO₄). It is a strong acid.

5. Which one of the following pairs of materials serve as electrodes in chargeable batteries commonly used in devices such as torchlights, electric shavers etc.? [I.A.S. (Pre) 1995]

Correct Answer: (a) Nickel and Cadmium
Solution:Nickel and Cadmium are mainly used as electrodes in rechargeable batteries of mobiles, torchlights and electric shavers etc. In this, cathode of nickel hydroxide and anode of cadmium is used. Potassium hydroxide is mainly used as electrolyte in it.

6. In microwave oven, the microwave tube used is: [R.A.S./R.T.S. (Pre) 2012]

Correct Answer: (c) Magnetron tube
Solution:The Magnetron tube is a high-powered vacuum tube used to produce high microwave energy. It operates by the motion of electrons under the influence of electric and magnetic fields.

7. Match List – I with List – II and select the correct answer from the code given below: [U.P.P.C.S. (Pre) 2013]

 

List-I

List-II

A. Freon

1. Anti-knocking agent

B. Tetraethyl lead

2. Refrigerant

C. Benzene hexachloride

3. Fire extinguisher
D. Carbon tetrachloride4. Insecticide

 

CodeABCD
(a)1234
(b)3214
(c)4123
(d)2143

 

Correct Answer: (d)
Solution:
  • Freon: Refrigerant
  • Tetraethyl lead: Anti-knocking agent
  • Benzene hexachloride: Insecticide
  • Carbon tetrachloride: Fire extinguisher

8. Match List-I with List-II and select the correct answer: [60th to 62th B.P.S.C. (Pre) 2016]

List-IList-II
A. Aspartame1. Synthetic rubber
B. Freon2. Anti-histamine
C. Neoprene3. Artificial Sweetener
D. Benadryl4. Refrigerant

 

CodeABCD
(a)3421
(b)4321
(c)4312
(d)3412

 

Correct Answer: (c)
Solution:Explanation:
  • Aspartame: Artificial Sweetener
  • Freon: Refrigerant
  • Neoprene: Synthetic Rubber
  • Benadryl: Anti-histamine

9. Consider the following pairs: [I.A.S. (Pre) 2017]

Commonly used/ Consumed materialsUnwanted or controversial chemicals likely to be found in them
1. LipstickLead
2. Soft drinksBrominated vegetable oils
3. Chinese fast foodMonosodium glutamate

Which of the pairs given above is/are correctly matched?

Correct Answer: (d) 1, 2, and 3
Solution:Lead is a common impurity found in cosmetic lip products, such as lipsticks and other cosmetics, such as eye shadows, blushes, compact powders, shampoos and body lotions. Brominated vegetable oil is a food additive used primarily to help emulsify citrus-flavored soft drinks, preventing them from separating during distribution. It is banned as a food additive in Europe and Japan. Monosodium glutamate (MSG) is a glutamate or salt of glutamic acid, a "non-essential" amino acid. It is a neurotransmitter- transporting messages from one nerve cell to another. Because it is said to enhance flavours, some scientists believe it "excites nerve endings" and exhibits "neuro-excitatory properties," that the ability to stimulate neurons. It is used in chinese fast food.

10. Match List-I with List-II and select the correct answer using the code given below the lists: [I.A.S. (Pre) 1998]

List-IList-II
A. Potassium bromide1. Fertilizer
B. Potassium nitrate2. Photography
C. Potassium sulphate3. Bakery
D. Monopotassium tartrate4. Gunpowder

 

 

ABCD
(a)2413
(b)2431
(c)4231
(d)4213

 

Correct Answer: (d)
Solution:Explanation:
  • Potassium bromide is used in photography.
  • Potassium nitrate is used in gunpowder.
  • Potassium sulphate is used as fertilizer.
  • Monopotassium tartrate is used in the bakery.